aparler/RosettaCodeData
1
0
Fork 0
Code Issues 12 Pull requests 3 Projects Releases Packages Wiki Activity Actions

Data commit

Browse source
This commit is contained in:
Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
199093 changed files with 3378972 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

40
Task/Longest-common-substring/C-sharp/longest-common-substring-1.cs Normal file
View file

@ -0,0 +1,40 @@
using System;
namespace LongestCommonSubstring
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine(lcs("thisisatest", "testing123testing"));
Console.ReadKey(true);
}
public static string lcs(string a, string b)
{
var lengths = new int[a.Length, b.Length];
int greatestLength = 0;
string output = "";
for (int i = 0; i < a.Length; i++)
{
for (int j = 0; j < b.Length; j++)
{
if (a[i] == b[j])
{
lengths[i, j] = i == 0 || j == 0 ? 1 : lengths[i - 1, j - 1] + 1;
if (lengths[i, j] > greatestLength)
{
greatestLength = lengths[i, j];
output = a.Substring(i - greatestLength + 1, greatestLength);
}
}
else
{
lengths[i, j] = 0;
}
}
}
return output;
}
}
}

35
Task/Longest-common-substring/C-sharp/longest-common-substring-2.cs Normal file
View file

@ -0,0 +1,35 @@
//C# program tests the LCSUBSTR (Longest Common Substring) subroutine.
using System;
namespace LongestCommonSubstring
{
class Program
{
static void Main(string[] args)
{
string a = args.Length >= 1 ? args[0] : ""; /*get two arguments (strings). */
string b = args.Length == 2 ? args[1] : "";
if (a == "") a = "thisisatest"; /*use this string for a default. */
if (b == "") b = "testing123testing"; /* " " " " " " */
Console.WriteLine("string A = {0}", a); /*echo string A to screen. */
Console.WriteLine("string B = {0}", b); /*echo string B to screen. */
Console.WriteLine("LCsubstr = {0}", LCsubstr(a, b)); /*tell Longest Common Substring. */
Console.ReadKey(true);
} /*stick a fork in it, we're done.*/
/*─────────────────────────────────LCSUBSTR subroutine─────────────────────────────────*/
public static string LCsubstr(string x, string y) /*Longest Common Substring. */
{
string output = "";
int lenx = x.Length; /*shortcut for using the X length*/
for (int j = 0; j < lenx; j++) /*step through start points in X.*/
{
for (int k = lenx - j; k > -1; k--) /*step through string lengths. */
{
string common = x.Substring(j, k); /*extract a common substring. */
if (y.IndexOf(common) > -1 && common.Length > output.Length) output = common; /*longest?*/
} /*k*/
} /*j*/
return output; /*$ is "" if no common string. */
}
}
}

33
Task/Longest-common-substring/C-sharp/longest-common-substring-3.cs Normal file
View file

@ -0,0 +1,33 @@
//C# program tests the LCS (Longest Common Substring) subroutine.
using System;
namespace LongestCommonSubstring
{
class Program
{
static void Main(string[] args)
{
string a = args.Length >= 1 ? args[0] : ""; /*get two arguments (strings). */
string b = args.Length == 2 ? args[1] : "";
if (a == "") a = "thisisatest"; /*use this string for a default. */
if (b == "") b = "testing123testing"; /* " " " " " " */
Console.WriteLine("string A = {0}", a); /*echo string A to screen. */
Console.WriteLine("string B = {0}", b); /*echo string B to screen. */
Console.WriteLine("LCS = {0}", lcs(a, b)); /*tell Longest Common Substring. */
Console.ReadKey(true);
} /*stick a fork in it, we're done.*/
/*─────────────────────────────────LCS subroutine─────────────────────────────────*/
private static string lcs(string a, string b)
{
if(b.Length<a.Length){ string t=a; a=b; b=t; }
for (int n = a.Length; n > 0; n--)
{
for (int m = a.Length-n; m <= a.Length-n; m++)
{
string s=a.Substring(m,n);
if(b.Contains(s)) return(s);
}
}
return "";
}
}